It 273

Unit 2

Questions:

a. The seventh layer of the OSI model is the Application ____ layer.

b. Protocols in the Transport____layer accept data from the Session layer and manage end-to-end delivery of data.

c. True or False: The IP (Internet Protocol) operates in the Transport layer.

d. True or False: Standards help to ensure interoperability between software and hardware from different manufacturers.

e. True or False: Standards define maximum acceptable performance.

7.Application | Provides interface between applications and network for interpreting application requests and requirements | Gateways, proxy servers, Application switches, Content filtering firewalls | BOOTPC DHCP, DNS, FTP, HTTP, HTTPS, IMAP4, IMAPS, PING, POP3, NSLOOKUP, UTP, SETP, SMTP, SNMP, Telnet, TFTP | |

6.Presentation | Allows hosts and applications to use a common language; performs data formatting, encryption and compression | Gateways, proxy servers, Application switches, Content filtering firewalls | WAPs, and NICs | |

5.Session | Establishes, maintains, and terminates user connections | Gateways, proxy servers, Application switches, Content filtering firewalls | RIP, SIP | |

4.Transport | Ensures accurate delivery of data through flow control, segmentation and reassembly, error correction, and acknowledgment | Gateways, proxy servers, Application switches, Content filtering firewalls | TCP, UDP,. | |

3.Network | Establishes network connections; translates network addresses into their physical counterparts and determines routing | Routers, Layer 3switches, Firewalls | ARPP,ICMP, IGMP, IP, IPSec, RARP | |

2.Data Link | Packages date in frames appropriate to network transmission method | Bridges, Switches, Wireless access points | L2TP, PPP, PPTP, SLIP | |

1.Physical | Manages signaling to and from physical network connections | Hubs, Repeaters | IEEE 802.3 (Ethernet), 802.5 (token ring), 802.11 (Wi Fi) | |